John h



(No Model.)

J. H. SHAW.

' SPRING HINGE.

No. 508,249. Patented'Nov. '7, 1893.

NITED STAT-ES PATENT QFFIGE.

JOHN H. SHAW, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TOTHE SARGENT & COMPANY, OF SAME PLACE.

SPRING-HINGE.

SPECIFICATION forming part of Letters Patent No. 508,249, dated November 7, 1893.

Application iea'm'a 1,1893. Serial No. 472,459. (Nb model.)

Haven, in the county of New Haven and State 1 of Connecticut, have invented a new Improvement in Spring-Hinges; and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon, to be a full, clear,

. and exact description of the same, and which said drawings constitutepart of this specifi-' cation, and represent, in

Figure l, a view in elevation. of a springhinge constructed in accordance with my invention; Fig. 2, an inside view thereof; Fig. 3, a view of the hinge in transverse section on the line ab of Fig. 2; Fig. 4, a sectional view on the line cd of Fig. 2.

My invention relates to an improvement in that class of spring-hinges employing a single spring, acting to hold the door open as well as closed, the object being to produce at a low cost for manufacture a simple, durable and effective device.

With these ends in view, my invention consists in a spring-hinge having certain details of construction and combinations of parts as will be hereinafter described and pointed out in the claims.

The leaf A, of my improved hinge, I construct with pintle-ears B B, respectively located at its opposite ends, and carrying fixed hinge-pintles C C, extending toward each other. The said ear B is furnished with an inwardly extending finger D, for the attachment of the outer end of the link E, which will be referred to later on. The other leaf F, of the hinge is constructed at its opposite ends with pintle-socket ears G G, arranged to fit within the ears B B of the leaf A, the leaf F, being also furnished witha semi-circular casing or shield H, cast integral with it, and extending inward between its respective ears. The ear G, of the leafF,is constructed with an open pintle-socket g, which receives the fixed pintle C, of the ear B, of the leaf A, while the ear G of the leaf F, is constructed with a closed pintle-socket g, which receives the fixed pintle C of'the ear B, of the leaf A.

The open pintle-socket g, has the form of a slot leading from the edge of the ear G into the center thereof from its outer face, its inner end being closed bya wall 9 while the closed pintle-socket g is simplya round opening extending transversely through the ear G.

My improved hinge is also provided with a spiral spring L'which is located within the shield or casing H,-before mentioned,a shaft J, extending longitudinally through the said spring, and a coupling-head K made independent of and loosely mounted on the said shaft near one end 1 thereof. The opposite ends of the said shaft .Lare enteredinto open shaft-sockets jj, respectively formed in the inner ends of the ears G G of the leaf F, the said sockets entering the said cars from the inner faces thereof, and the outer ends of the sockets being closed by walls j j which prevent the shaft from longitudinal displacement. It is necessary, therefore, that the said shaft should be longer than the distance between the said ears G G and that the said head K. should not be located directly at one of its ends but near or within the same. One end '1', of the spring I, is connected with the leaf F, by its extension through an opening f, formed therein, the spring being supported in place at this end by means of shoulders f and f? formed within the leaf, as shown in Fig. 2 of the drawings. The opposite end of the spring is hooked, as at i, and entered into a notch lo, formed in the inner edge of the coupling-head K, which is provided upon its outer edge with a short finger or knob Z0 receiving the inner end of the link E, the other end of the said link being connected, as before described, with the finger D, extending inward from the pintle-ear B, of the leaf A.

It will be understood that under the construction above described, the shaft, the spring, the coupling-head and the link will move in the arc of a circle of which the center is a line joining the two pintles. When the outer end of the link is carried outside of the said line,the spring will tend to pull the leaves into parallelism, or into the positions which they take when the door is open. On the other hand when the outer end of the said link passes inside of the said line, the spring will at once begin to pull the leaves into the same plane, which is the position due them when the door to which they are applied is closed. It will be understood, also, from the foregoing description, that the parts of my improved hinge may be assembled with the minimum of labor, this because with one exception the sockets in the ears of the leaves are open. I am aware, however, that it is not broadly new to construct the ears of the leaves of a spring-hinge of the character shown and described, with open sockets, nor to provide the spring-shaft of such a hinge with a head and connecting the said head by means of a link with one of the leaves of the hinge and I do not therefore claim those constructions broadly.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a spring-hinge, the combination with a leaf having ears carrying pintles, of a leaf having ears adapted to receive the said pintles, a shaft having its ends entered into the cars of the leaf last mentioned and therefore made longer than the distance between the said ears, a spring encircling the said shaft, and having one end connected with the said leaf, a coupling head made independent of and mounted on the shaft near one end thereof but Within the same and having the other end of the spring attached to it, 'and a link connected with the said head and with one of the pintle-carrying ears of the other leaf, substantially as described.

2. In a spring-hinge, the combination with a leaf A, having ears B B carrying fixed hinged pintles C C, of a leaf F, having ears G G adapted to receive the said pintles and respectively constructed at their inner ends and in their inner faces with open shaftsocketsj and j, which are closed at their outer ends by walls f 7' a shaft J having its ends entered into the said open shaft-sockets and prevented from longitudinal displacement by the said end walls thereof, a coupling-head K, made independent of and mounted on the shaft near one end thereof, a spring I, encircling the said shaft, and having its ends connected with the said leaf F, and the couplinghead K, and a link E, connecting the said head K, and the leaf A, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

JOHN H. SHAW. Witnesses:

L. J. KIRKHAM, BRUCE FENN. 

